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      <a href="/2018/01/20/vue2-notes-14-sealed-component/" title="Vue2使用笔记14--Datetimepicker组件封装" itemprop="url">Vue2使用笔记14--Datetimepicker组件封装</a>
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      <a href="https://godbasin.github.io" title="被删">被删</a>
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    <time datetime="2018-01-20T15:01:37.000Z" itemprop="datePublished">2018-01-20</time>
    更新日期:<time datetime="2018-12-18T15:41:36.260Z" itemprop="dateModified">2018-12-18</time>
    
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			<strong class="toc-title">文章目录</strong>
		<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#组件封装"><span class="toc-number">1.</span> <span class="toc-text">组件封装</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#组件的自我修养"><span class="toc-number">1.1.</span> <span class="toc-text">组件的自我修养</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#Datetimepicker-组件封装"><span class="toc-number">1.2.</span> <span class="toc-text">Datetimepicker 组件封装</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#使用Datetimepicker组件"><span class="toc-number">1.3.</span> <span class="toc-text">使用Datetimepicker组件</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">2.</span> <span class="toc-text">结束语</span></a></li></ol>
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		<p>最近在使用 Vue2 作为项目中前端的框架，《Vue2 使用笔记》系列用于记录过程中的一些使用和解决方法。本文记录简单封装组件的过程。</p>
<a id="more"></a>
<h2 id="组件封装"><a href="#组件封装" class="headerlink" title="组件封装"></a>组件封装</h2><hr>
<p>在 MVVM 框架盛行的今天，组件封装的思维必不可少。不管是 Angular、Vue、React，还是又新兴的一些框架，我们在写代码的过程中，老生常谈的都是抽象和封装这样的事情。</p>
<h3 id="组件的自我修养"><a href="#组件的自我修养" class="headerlink" title="组件的自我修养"></a>组件的自我修养</h3><p>这里，我们在封装 Datetimepicker 的时候，主要是要把这种可重复使用的组件提取的思维，给发散到各个地方。</p>
<p>前面我们在使用一些插件的时候，更多的是在页面和业务逻辑中封装一些方法，方便使用，像这几个：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="comment">// 设置iCheck插件初始化</span></div><div class="line">SetICheck(that);</div><div class="line"><span class="comment">// 设置switchery插件初始化</span></div><div class="line">SetSwitchery(that);</div><div class="line"><span class="comment">// 设置daterangepicker插件初始化</span></div><div class="line">SetDaterangepicker(that, <span class="string">"#single_cal3"</span>);</div></pre></td></tr></table></figure>
<p>但是，其实我们也可以将逻辑结合视图部分，一起封装成一个组件。<br>通常来说，一个组件的自我修养包括以下内容：</p>
<ul>
<li>组件内维护自身的数据和状态</li>
<li>组件内维护自身的事件</li>
<li>通过初始化事件（event、绑定的scope事件，传入数据），来初始化组件状态，激活组件</li>
<li>通过更改某个配置，来控制展示</li>
<li>通过对外提供接口，可查询组件状态</li>
</ul>
<p>如上，作为一个独立的组件，我们需要提供与外界交互的接口。</p>
<p>同时，我们在设计一个组件时，需要考虑视图配置，来适应不同场景的使用，例如：</p>
<ul>
<li>通过某个属性配置某个部分是否显示</li>
<li>通过一个属性配置需要显示的所有部分</li>
<li>通过传入初始值进行相关显示控制</li>
</ul>
<p>这些都是基本的配置化思想，与组件结合使用会有很不错的效果。</p>
<h3 id="Datetimepicker-组件封装"><a href="#Datetimepicker-组件封装" class="headerlink" title="Datetimepicker 组件封装"></a>Datetimepicker 组件封装</h3><p>首先，我们使用的插件是<a href="http://www.bootcss.com/p/bootstrap-datetimepicker/" target="_blank" rel="external">bootstrap-datetimepicker</a>。<br>更多的配置项，可以参考官方文档，这里我们直接看代码吧。</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div><div class="line">53</div><div class="line">54</div><div class="line">55</div><div class="line">56</div><div class="line">57</div><div class="line">58</div><div class="line">59</div><div class="line">60</div><div class="line">61</div><div class="line">62</div><div class="line">63</div><div class="line">64</div><div class="line">65</div><div class="line">66</div><div class="line">67</div><div class="line">68</div><div class="line">69</div><div class="line">70</div><div class="line">71</div><div class="line">72</div><div class="line">73</div><div class="line">74</div><div class="line">75</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">template</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">class</span>=<span class="string">"form-control form-input"</span> <span class="attr">:placeholder</span>=<span class="string">"placeholder"</span> <span class="attr">:value</span>=<span class="string">"date"</span> <span class="attr">style</span>=<span class="string">"position: relative;"</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">template</span>&gt;</span></div><div class="line"></div><div class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span><span class="javascript"></span></div><div class="line"></div><div class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</div><div class="line">  <span class="attr">name</span>: <span class="string">"Datetimepicker"</span>,</div><div class="line">  data() &#123;</div><div class="line">    <span class="keyword">return</span> &#123;</div><div class="line">      <span class="attr">date</span>: <span class="string">""</span></div><div class="line">    &#125;;</div><div class="line">  &#125;,</div><div class="line">  <span class="attr">props</span>: &#123;</div><div class="line">    <span class="attr">placeholder</span>: &#123; <span class="comment">// 占位提示</span></div><div class="line">      type: <span class="built_in">String</span>,</div><div class="line">      <span class="attr">default</span>: <span class="string">""</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">format</span>: &#123; <span class="comment">// 格式化日期时间</span></div><div class="line">      type: <span class="built_in">String</span>,</div><div class="line">      <span class="attr">default</span>: <span class="string">"yyyy-mm-dd hh:ii:ss"</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">minView</span>: &#123; <span class="comment">// 最小视图</span></div><div class="line">      type: <span class="built_in">Number</span>,</div><div class="line">      <span class="attr">default</span>: <span class="number">0</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">startView</span>: &#123; <span class="comment">// 起始视图</span></div><div class="line">      type: <span class="built_in">Number</span>,</div><div class="line">      <span class="attr">default</span>: <span class="number">2</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">maxView</span>: &#123; <span class="comment">// 最大视图</span></div><div class="line">      type: <span class="built_in">Number</span>,</div><div class="line">      <span class="attr">default</span>: <span class="number">4</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">startDate</span>: &#123; <span class="comment">// 最早可选时间</span></div><div class="line">      type: <span class="built_in">Date</span>,</div><div class="line">      <span class="attr">default</span>: <span class="literal">null</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">endDate</span>: &#123; <span class="comment">// 最晚可选时间</span></div><div class="line">      type: <span class="built_in">Date</span>,</div><div class="line">      <span class="attr">default</span>: <span class="literal">null</span></div><div class="line">    &#125;,</div><div class="line">    <span class="attr">defaultDate</span>: &#123; <span class="comment">// 默认时间</span></div><div class="line">      type: <span class="built_in">String</span>,</div><div class="line">      <span class="attr">default</span>: <span class="string">''</span></div><div class="line">    &#125;</div><div class="line">  &#125;,</div><div class="line">  mounted() &#123;</div><div class="line">    <span class="comment">// 设置默认时间</span></div><div class="line">    <span class="keyword">this</span>.date = <span class="keyword">this</span>.defaultDate</div><div class="line">    <span class="comment">// 初始化表单事件</span></div><div class="line">    $(<span class="keyword">this</span>.$el)</div><div class="line">      .datetimepicker(&#123;</div><div class="line">        <span class="attr">language</span>: <span class="string">"zh-CN"</span>,</div><div class="line">        <span class="attr">format</span>: <span class="keyword">this</span>.format,</div><div class="line">        <span class="attr">autoclose</span>: <span class="literal">true</span>,</div><div class="line">        <span class="attr">startView</span>: <span class="keyword">this</span>.startView,</div><div class="line">        <span class="attr">minView</span>: <span class="keyword">this</span>.minView,</div><div class="line">        <span class="attr">maxView</span>: <span class="keyword">this</span>.maxView,</div><div class="line">        <span class="attr">startDate</span>: <span class="keyword">this</span>.startDate,</div><div class="line">        <span class="attr">endDate</span>: <span class="keyword">this</span>.endDate</div><div class="line">      &#125;)</div><div class="line">      .on(<span class="string">"hide"</span>, ev =&gt; &#123;</div><div class="line">        <span class="keyword">this</span>.date = $(ev.target).val();</div><div class="line">        <span class="comment">// 触发change事件</span></div><div class="line">        <span class="keyword">this</span>.$emit(<span class="string">"change"</span>, <span class="keyword">this</span>.date);</div><div class="line">      &#125;);</div><div class="line">  &#125;,</div><div class="line">  beforeDestroy() &#123;</div><div class="line">    <span class="comment">// 销毁</span></div><div class="line">    $(<span class="keyword">this</span>.$el)</div><div class="line">      .datetimepicker(<span class="string">"remove"</span>);</div><div class="line">  &#125;</div><div class="line">&#125;;</div><div class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></div></pre></td></tr></table></figure>
<p>是不是很简单，其实Vue提供的封装功能也是很方便的。<br>组件化和配置化思想，不应该局限于框架，应该是要发散到各个地方的。</p>
<h3 id="使用Datetimepicker组件"><a href="#使用Datetimepicker组件" class="headerlink" title="使用Datetimepicker组件"></a>使用Datetimepicker组件</h3><p>封装过后，我们使用起来就是很简单的事情了，只需要两个步骤：</p>
<ol>
<li>引入组件（全局或局部）。</li>
</ol>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div></pre></td><td class="code"><pre><div class="line"><span class="comment">// main.js 全局引入</span></div><div class="line"><span class="keyword">import</span> Datetimepicker <span class="keyword">from</span> <span class="string">'components/Datetimepicker'</span></div><div class="line"></div><div class="line">Vue.component(<span class="string">'Datetimepicker'</span>, Datetimepicker)</div><div class="line"></div><div class="line"><span class="comment">// ...其他配置</span></div><div class="line"></div><div class="line"><span class="keyword">new</span> Vue(&#123;</div><div class="line">    <span class="comment">// ...</span></div><div class="line">&#125;).$mount(<span class="string">'#app'</span>)</div></pre></td></tr></table></figure>
<ol>
<li>使用组件，绑定配置和事件。</li>
</ol>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">Datetimepicker</span> <span class="attr">:defaultDate</span>=<span class="string">"new Date().format('yyyy-MM-dd')"</span> <span class="attr">:endDate</span>=<span class="string">"new Date()"</span> <span class="attr">:format</span>=<span class="string">"'yyyy-mm-dd'"</span> <span class="attr">:minView</span>=<span class="string">"4"</span> @<span class="attr">change</span>=<span class="string">"getValue($event)"</span>  /&gt;</span></div></pre></td></tr></table></figure>
<p>上面的使用中，我们设置了默认时间为今天的日期，结束时间为当前（即可选择今天以前的时间），格式化为“年-月-日”方式，最小视图为日期选择，同时选择时间变更的时候绑定<code>getValue</code>事件。</p>
<ul>
<li>页面效果</li>
</ul>
<p><img src="https://github-imglib-1255459943.cos.ap-chengdu.myqcloud.com/1514893996%281%29.jpg" alt="image"></p>
<h2 id="结束语"><a href="#结束语" class="headerlink" title="结束语"></a>结束语</h2><hr>
<p>组件封装和配置化，乃是程序员必备技能。提高开发效率，同时锻炼逻辑思维抽象能力，你值得拥有。<br>这里我们的Datetimepicker是基于input来实现的，但其实还能用v-model来改善，这块后面会说到。<br><a href="https://github.com/godbasin/godbasin.github.io/tree/blog-codes/vue2-notes/14-sealed-component" target="_blank" rel="external">此处查看项目代码</a><br><a href="http://vue2-notes.godbasin.com/14-sealed-component/index.html#/app/logs" target="_blank" rel="external">此处查看页面效果</a></p>
  
		
		<p style="margin-top:50px;">查看Github有更多内容噢：<a href="https://github.com/godbasin">https://github.com/godbasin</a></p>
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	<img src="https://github-imglib-1255459943.cos.ap-chengdu.myqcloud.com/2code2.jpg" width="200" height="200" style="display:block;margin: 0 auto;" />
	<p style="text-align: center;margin-top: 10px;margin-bottom: 20px;">码生艰难，写文不易，给我家猪囤点猫粮了喵~</p>
	<div class="author-right">
  		<p>作者：被删</p>
  		<p>出处：<a href="https://godbasin.github.io">https://godbasin.github.io</a></p>
  		<p>本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。</p>
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  <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#组件封装"><span class="toc-number">1.</span> <span class="toc-text">组件封装</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#组件的自我修养"><span class="toc-number">1.1.</span> <span class="toc-text">组件的自我修养</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#Datetimepicker-组件封装"><span class="toc-number">1.2.</span> <span class="toc-text">Datetimepicker 组件封装</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#使用Datetimepicker组件"><span class="toc-number">1.3.</span> <span class="toc-text">使用Datetimepicker组件</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">2.</span> <span class="toc-text">结束语</span></a></li></ol>
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